Ok,

I have a 1992 CX that runs PERFECT, but it is SLOW. I got it and wanted a D15B7 and all that, then a SOHC VTEC, but want to autocross. That would put me in SM and I don't know if I want to be in SM.

End of story basically lol.

I would like to run STS and that does not permit engine changes. My question is, if I had a Z6 IM, EX/SI tranny, Stage 2 clutch, header, intake, exhaust, a few other small mods, if the B8 is a reliable motor at high RPM's? 8 valves just seems weaker? Or is it?

Also a side note, does a D15B7 ECU add any power or anything?

Basic questions, how reliable are these B8's at high RPM's? Will be doing track days as well, it already sees visits to the mountains almost every other week and so far has never missed a beat

Thanks!

Simon

 

I'm also curious about this, so any help would be appreciated!

 

haha i would love to sell someone build a b8

 

Nobody ever built one or driven hard on one for a long time? Is it being 8 valves actually weaker? Or just slower? Can it be campared to other D series reliability wise. Remember I am not going for high HP drag car this is an auto X, track day car. It has to at least be kind of "quick"....for an 8 valve lol

 

ok, i'm gonna say this and more then likely get flames for it but IMO the ONLY D series' that are worth anything are the d16s and higher. the amount of money/time u spend getting it to perform to it's "limit" will more than likely be about the same as a stock d16/b series. honestly, dont waste ur money.

 

2 valves isn't weaker, it just flows less air.

 

The motor itself is absolutely useless to build up.

If you're gonna boost it (which is basically your ONLY option), go out on a limb w/ the extra 150 or 250 bucks for a Z6 motor - straight up swap in aside from VTEC wiring, P28 controlled, your axles and tranny will work in there.

Then boost that.

Boosting this is just about useless, and boosting is pretty much all you can do to extract power from 4 bangers.

Get a D16Z6 or a JDM D15b.

Boosting a B8's like punching a brick wall - you really aren't getting anywhere.

If you do boost it (dumb decision) and you get ur slow *** HP outta it, and you're still running that B8, and you spend more than 600 on the turbo build - you suck at life.

A 200 dollar turbo build may be in order for that engine with SMICs and DSM ****, but that's about it.



Keep the motor or swap 'n boost.

You're really spinnin ur tires (<u>or lack there of in your case </u>) tryin to extract power outta that thing...

 

Please read my whole post and see what I am trying to do lol.

NOT trying to get high HP or anything, basically asking if it will be reliable with those mods. Not fast.

Main question: Can it hold high RPM without blowing something up...?

Thanks!!

 

Nobody ever autocrossed a B8? I'll be the first??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Simon Tibbett &raquo;</TD></TR><TR><TD CLASS="quote">I have a 1992 CX that runs PERFECT, but it is SLOW. I got it and wanted a D15B7 and all that, then a SOHC VTEC, but want to autocross. That would put me in SM and I don't know if I want to be in SM.</TD></TR></TABLE>
Not all engine/transmission swaps bump to SM - some are legal for SP, depending on how the car and related models are listed in the rule book. You could actually update/backdate to the complete D15B7 drivetrain (that includes the transmission) and stay in FSP. A D16Z6 drivetrain swap would put you into SM, since the SOHC VTEC Civic is listed on a separate line/class in SP.

Believe it or not, a '92 CX chassis with a D15B7 engine and trans swap is one of the must-have cars for FSP. A good driver with the right suspension work (springs/dampers/sway bars/alignment) and wheel/tire combo (13x8s with 225 Hoosiers) will PAX very well at any event.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">I would like to run STS and that does not permit engine changes. My question is, if I had a Z6 IM, EX/SI tranny, Stage 2 clutch</TD></TR></TABLE>
Those items are not STS-legal. You'd still go to FSP at a minimum.

Having a D15B8 in STS is like bringing a knife to a gunfight. You can still have fun, but don't expect to be beating a well-driven and well-prepped '89 Civic Si.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Nobody ever autocrossed a B8? I'll be the first?? </TD></TR></TABLE>
No, you definitely won't be. Anyone can autocross any legal car, and people do, regardless of whether the car is competitive or not. Most people are out there for the fun #1, and the competition #2.



Modified by Targa250R at 1:56 PM 12/28/2006

 

Ok thanks!

 

Throw some ex/si badges on it and say it came with the z6 motor. What are they gonna do check your vin?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by djsire &raquo;</TD></TR><TR><TD CLASS="quote">Throw some ex/si badges on it and say it came with the z6 motor. What are they gonna do check your vin? </TD></TR></TABLE>
It is painfully obvious that a CX chassis is not an EX or Si, even without looking at the VIN. Autocrosses are populated by car enthusiasts that know better, not by idiots.

And why even attempt to cheat? That's lame.

 

One of these days you're going to listen to me. Your 8valve head is garbage, no matter what you do to it.

You could spend $1000 dollars on that 8valve head, and it will still make less power than a 15 dollar d15b7 16valve head.

 

I know, but I am trying to build an autocross car not a "fast" car, I guess maybe swap in the D15B7 and run FSP...

 

But you're already talking about modifying it?

 

What do you mean? Just for a little more grunt on a autocross track and road course. I would rather have a slow reliable motor and enough funds to enter events then spend it all on building another motor.

Modifying the B8 just with bolt ons and all.

 

You will spend more time/money on the boltons and get less results than just switching to a stock d15b7.

The question is which pistons are in your d15b8 block?

d15b6 hf pistons? or
d15b7 pistons?

 

I know but I was saying the SCCA class I was looking at wont allow that, so I thought, I have all the bolt ons already, just need a clutch, tranny, and IM to be "complete"

 

Aren't D15 Rods like very hard to find for the B7

 

They are available, but it's cheaper to get a d16 + rods.

Or use a d15b crank with reworked b16 rods.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bense &raquo;</TD></TR><TR><TD CLASS="quote">You will spend more time/money on the boltons and get less results than just switching to a stock d15b7.

The question is which pistons are in your d15b8 block?

d15b6 hf pistons? or
d15b7 pistons?

</TD></TR></TABLE>

That was the point in my last post that I got flamed for.

It's not worth upgrading - at all. The power upgrades are so insignificant, the money you can be using to bolt-up a CX with what you're thinking of could buy a stock Z6 and be making more power...

I mean ****, you can do all your clutch work, and name brand parts to that stock *** B8 and I'll still blow your doors off with my stock *** Z6 I/H/E in the 1/4. Not to mention I'd be running a heavier coupe than your hatch.

Not trying to put you down, just tryin to put it in perspective. The B8 is an economy engine, it suffers greatly in terms of power gains.

That's all I'm trying to say.

 

SIMON! That's awesome to hear that somebody is actually talking about the d15b8 for once. haha. I used to have a 1992 cx just before i got my 94dx hatch. the 92 cx i picked up for 250$ and it had 245k miles on it. I bought it from my neighbor, changed the oil every 4000 miles (castrol syntec with mobil 1 filter) and took perhaps more care of that car than anyone else who was driving a car with 245k miles would. Anyway, when i saved enough money to get aa d16z6 and some mods, the car had around 303k miles on it. the only problem i ever came in contact with that car was the synchro for 2nd gear wore out.

Anyway, the d15b8 is pretty bullet proof as far as dependability, and in all honesty i did a lot of spirited driving (racing...if you can call it that...seeing as it only had ~75hp) but...before that was my first car; a ford tempo.

if you're interested i have some old pics of it up at cardomain.com look up morpheus1684 and there'll be a page with both my 92 and 94 civics.

in closing tho, as far as dependability...i've never seen, or heard of anything lasting so long, with such little maintenance. like i said...i drove it for about 3 years, and i drove it everywhere without an engine problem.

 

Syndicate... this is an autocross race car build for a class, it is not open class or unlimited. I dont want straight line speed... morpheus1684 thanks for the info. Before I race it a lot I just want to be sure it is as reliable as any other D series.

I dont even plan on running the 1/4 even for fun, straight line has never interested me at all.

 

you guys arent getting his point..

HE DOESNT CARE ABOUT HOW MUCH HP HE IS MAKING or if hes gonna beat the next Si that he sees on the street, he just wants to know whether or not his engine will still be RELIABLE at high rpm's for AUTOCROSS